public byte[] GetBytes()
{
byte[] header = Header.GetBytes();
byte[] packet = new byte[header.Length + Payload.Length];
Array.Copy(header, packet, header.Length);
Array.Copy(Payload, 0, packet, header.Length, Payload.Length);
return(packet);
}
private void Send()
{
try
{
int payloadSize = RTPPacketSendSize;
RTPPacket rtpPacket = new RTPPacket(RTPPacketSendSize);
byte[] rtpBytes = rtpPacket.GetBytes();
RTPHeader rtpHeader = new RTPHeader();
rtpHeader.SequenceNumber = (UInt16)65000; //Convert.ToUInt16(Crypto.GetRandomInt(0, UInt16.MaxValue));
uint sendTimestamp = uint.MaxValue - 5000;
uint lastSendTimestamp = sendTimestamp;
UInt16 lastSeqNum = 0;
logger.Debug("RTP send stream starting to " + IPSocket.GetSocketString(m_streamEndPoint) + " with payload size " + payloadSize + " bytes.");
Sending = true;
m_startRTPSendTime = DateTime.MinValue;
m_lastRTPSentTime = DateTime.MinValue;
m_sampleStartSeqNo = rtpHeader.SequenceNumber;
DateTime lastRTPSendAttempt = DateTime.Now;
while (m_udpListener != null && !StopListening)
{
// This may be changed by the listener so it needs to be set each iteration.
IPEndPoint dstEndPoint = m_streamEndPoint;
//logger.Info("Sending RTP packet to " + dstEndPoint.Address + ":" + dstEndPoint.Port);
if (payloadSize != m_rtpPacketSendSize)
{
payloadSize = m_rtpPacketSendSize;
logger.Info("Changing RTP payload to " + payloadSize);
rtpPacket = new RTPPacket(RTP_HEADER_SIZE + m_rtpPacketSendSize);
rtpBytes = rtpPacket.GetBytes();
}
try
{
if (m_startRTPSendTime == DateTime.MinValue)
{
m_startRTPSendTime = DateTime.Now;
rtpHeader.MarkerBit = 0;
logger.Debug("RTPSink Send SyncSource=" + rtpPacket.Header.SyncSource + ".");
}
else
{
lastSendTimestamp = sendTimestamp;
double milliSinceLastSend = DateTime.Now.Subtract(m_lastRTPSentTime).TotalMilliseconds;
sendTimestamp = Convert.ToUInt32((lastSendTimestamp + (milliSinceLastSend * TIMESTAMP_FACTOR)) % uint.MaxValue);
if (lastSendTimestamp > sendTimestamp)
{
logger.Error("RTP Sender previous timestamp (" + lastSendTimestamp + ") > timestamp (" + sendTimestamp + ") ms since last send=" + milliSinceLastSend + ", lastseqnum=" + lastSeqNum + ", seqnum=" + rtpHeader.SequenceNumber + ".");
}
if (DateTime.Now.Subtract(m_lastRTPSentTime).TotalMilliseconds > 75)
{
logger.Debug("delayed send: " + rtpHeader.SequenceNumber + ", time since last send " + DateTime.Now.Subtract(m_lastRTPSentTime).TotalMilliseconds + "ms.");
}
}
rtpHeader.Timestamp = sendTimestamp;
byte[] rtpHeaderBytes = rtpHeader.GetBytes();
Array.Copy(rtpHeaderBytes, 0, rtpBytes, 0, rtpHeaderBytes.Length);
// Send RTP packets and any extra channels required to emulate mutliple calls.
for (int channelCount = 0; channelCount < m_channels; channelCount++)
{
//logger.Debug("Send rtp getting wallclock timestamp for " + DateTime.Now.ToString("dd MMM yyyy HH:mm:ss:fff"));
//DateTime sendTime = DateTime.Now;
//rtpHeader.Timestamp = RTPHeader.GetWallclockUTCStamp(sendTime);
//logger.Debug(rtpHeader.SequenceNumber + "," + rtpHeader.Timestamp);
m_udpListener.Send(rtpBytes, rtpBytes.Length, dstEndPoint);
m_lastRTPSentTime = DateTime.Now;
m_packetsSent++;
m_bytesSent += rtpBytes.Length;
if (m_packetsSent % 500 == 0)
{
logger.Debug("Total packets sent to " + dstEndPoint.ToString() + " " + m_packetsSent + ", bytes " + NumberFormatter.ToSIByteFormat(m_bytesSent, 2) + ".");
}
//sendLogger.Info(m_lastRTPSentTime.ToString("dd MMM yyyy HH:mm:ss:fff") + "," + m_lastRTPSentTime.Subtract(m_startRTPSendTime).TotalMilliseconds.ToString("0") + "," + rtpHeader.SequenceNumber + "," + rtpBytes.Length);
//sendLogger.Info(rtpHeader.SequenceNumber + "," + DateTime.Now.ToString("dd MMM yyyy HH:mm:ss:fff"));
if (DataSent != null)
{
try
{
DataSent(m_streamId, rtpBytes, dstEndPoint);
}
catch (Exception excp)
{
logger.Error("Exception RTPSink DataSent. " + excp.Message);
}
}
lastSeqNum = rtpHeader.SequenceNumber;
if (rtpHeader.SequenceNumber == UInt16.MaxValue)
{
//logger.Debug("RTPSink looping the sequence number in sample.");
rtpHeader.SequenceNumber = 0;
}
else
{
rtpHeader.SequenceNumber++;
}
}
}
catch (Exception excp)
{
logger.Error("Exception RTP Send. " + excp.GetType() + ". " + excp.Message);
if (excp.GetType() == typeof(SocketException))
{
logger.Error("socket exception errorcode=" + ((SocketException)excp).ErrorCode + ".");
}
logger.Warn("Remote socket closed on send. Last RTP recevied " + m_lastRTPReceivedTime.ToString("dd MMM yyyy HH:mm:ss") + ", last RTP successfull send " + m_lastRTPSentTime.ToString("dd MMM yyyy HH:mm:ss") + ".");
}
Thread.Sleep(RTPFrameSize);
#region Check for whether the stream has timed out on a send or receive and if so shut down the stream.
double noRTPRcvdDuration = (m_lastRTPReceivedTime != DateTime.MinValue) ? DateTime.Now.Subtract(m_lastRTPReceivedTime).TotalSeconds : 0;
double noRTPSentDuration = (m_lastRTPSentTime != DateTime.MinValue) ? DateTime.Now.Subtract(m_lastRTPSentTime).TotalSeconds : 0;
double testDuration = DateTime.Now.Subtract(m_startRTPSendTime).TotalSeconds;
if ((
noRTPRcvdDuration > NO_RTP_TIMEOUT ||
noRTPSentDuration > NO_RTP_TIMEOUT ||
(m_lastRTPReceivedTime == DateTime.MinValue && testDuration > NO_RTP_TIMEOUT)) && // If the test request comes from a private or unreachable IP address then no RTP will ever be received.
StopIfNoData)
{
logger.Warn("Disconnecting RTP stream on " + m_localEndPoint.Address.ToString() + ":" + m_localEndPoint.Port + " due to not being able to send any RTP for " + NO_RTP_TIMEOUT + "s.");
StopListening = true;
}
// Shutdown the socket even if there is still RTP but the stay alive limit has been exceeded.
if (RTPMaxStayAlive > 0 && DateTime.Now.Subtract(m_startRTPSendTime).TotalSeconds > RTPMaxStayAlive)
{
logger.Warn("Shutting down RTPSink due to passing RTPMaxStayAlive time.");
Shutdown();
StopListening = true;
}
#endregion
}
}
catch (Exception excp)
{
logger.Error("Exception Send RTPSink: " + excp.Message);
}
finally
{
#region Shut down socket.
Shutdown();
if (SenderClosed != null)
{
try
{
SenderClosed(m_streamId, m_callDescriptorId);
}
catch (Exception excp)
{
logger.Error("Exception RTPSink SenderClosed. " + excp.Message);
}
}
#endregion
}
}